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Dark Voice 339 - Page 99

post #1471 of 2242
 - 
 
3/03/2013  -  Sunday
4:56 am
Arrived at FedEx location
 
NEWARK, NJ

 

guys we're getting closer, she arrived in NJ this morning!! due to be delivered on Wednesday..

I feel like buying some more tubes, anyone know a good source for those Tung Sol Mesh Plate 6sj7? those look so cool..

post #1472 of 2242

Haven't found/seen any in a while now. At least not for acceptable prices

post #1473 of 2242
Quote:
Originally Posted by Ultrainferno View Post

Haven't found/seen any in a while now. At least not for acceptable prices

+1 I agree..am so happy i have a pair.biggrin.gif

post #1474 of 2242
Quote:
Originally Posted by eantala View Post

 - 
 
3/03/2013  -  Sunday
4:56 am
Arrived at FedEx location
 
NEWARK, NJ

 

guys we're getting closer, she arrived in NJ this morning!! due to be delivered on Wednesday..

I feel like buying some more tubes, anyone know a good source for those Tung Sol Mesh Plate 6sj7? those look so cool..

!!! cant wait to see your pics and read impressions.

 

LOVE my 337, its an effing BEAST pushing output transformers and Grados. 

post #1475 of 2242
Quote:
Originally Posted by hifimanrookie View Post

+1 I agree..am so happy i have a pair.biggrin.gif

+2... hifi we have the same amp.  TS tubes sound amazing in the DV amps.

post #1476 of 2242
Quote:
Originally Posted by hifimanrookie View Post

+1 I agree..am so happy i have a pair.biggrin.gif
No need to rub it in frown.gif haha
post #1477 of 2242
Quote:
Originally Posted by kramer5150 View Post

!!! cant wait to see your pics and read impressions.

 

LOVE my 337, its an effing BEAST pushing output transformers and Grados. 


I though the 337 was OTL like the 339?

 

KP

post #1478 of 2242
Quote:
Originally Posted by TheKillerPiglet View Post


I though the 337 was OTL like the 339?

 

KP

Yes..so? Check some reviews and listen to my words..the 337 and 339 are one of the few tube amps which pair perfectly with the he500..but u have to have the latest model of the 337..with the extracapacitators..the older models are weaker in that area...but still do fine with the he500..i just found that out recently...the new ones are much better to drive a he500..the 339 is already better optimized for the he500...

post #1479 of 2242

He means: OTL = Output Transformer-Less

He was referring to the statement below

Quote:
Originally Posted by kramer5150 View Post

 

LOVE my 337, its an effing BEAST pushing output transformers and Grados. 

 

I rest my case.

Oh and all 339 owners just know the 337 can't touch it. Go to your own thread

I kid rolleyes.gif

post #1480 of 2242
Quote:
Originally Posted by TheKillerPiglet View Post


I though the 337 was OTL like the 339?

 

KP

Yes... but I push a pair of output transformers with mine, and use that to drive my low-Z Grados and K701.  Thats (IMHO) a better solution (far better with the Grados), being that it presents the tubes with an optimal high impedance load.  DV (for whatever reason) under-spec'd capacitance of the earlier 337 models.  It was something they recognized and addressed with re-released designs.

 

Threads of interest for those into DIY...

http://www.head-fi.org/t/652270/output-coupling-cap-and-transformer-mod

 

Theres some excellent OT discussions in this thread here, and some detailed FR and THD analysis by Elliottstudio in the latter posts:

http://www.head-fi.org/t/629661/a-lo-cost-ht-supply-true-transformer-coupled-tube-headphone-amplifier

 

 

 

 


Edited by kramer5150 - 3/4/13 at 10:07am
post #1481 of 2242

cool ^ ^
 

post #1482 of 2242
Quote:
Originally Posted by Ultrainferno View Post

cool ^ ^
 

Thanks... but I can't take credit for it.  Nikongod was the one who re-directed me in this regard.  Prior to that I was only thinking about capacitance upgrades, neglecting still the impedance miss-match issue.  Which really is the root cause here.  Impedance mis-matching I think is a very miss-understood design factor... a lot of amp makers tout their amps as "powerful enough to drive anything", and thats just not the case.

 

What a mod like this does is totally changes the playing field for anyone who has ever said/thought (myself included), "My low impedance Grado, Denon, Ortho, Sony (etc) can't work well with that OTL amp."  The 337 (even the older ones) are dual-mono well thought out designs that really lend well to OT coupling.  I am wondering how well a transformer mod works with the smaller DV and LD amps?... Some day I'll try it with those too.


Edited by kramer5150 - 3/4/13 at 10:21am
post #1483 of 2242
Quote:
Originally Posted by hifimanrookie View Post

Yes..so? Check some reviews and listen to my words..the 337 and 339 are one of the few tube amps which pair perfectly with the he500..but u have to have the latest model of the 337..with the extracapacitators..the older models are weaker in that area...but still do fine with the he500..i just found that out recently...the new ones are much better to drive a he500..the 339 is already better optimized for the he500...


Yes, the 339 drives my he500's fine. That wasn't my point.

 

KP

post #1484 of 2242
Quote:
Originally Posted by kramer5150 View Post

Yes... but I push a pair of output transformers with mine, and use that to drive my low-Z Grados and K701.  Thats (IMHO) a better solution (far better with the Grados), being that it presents the tubes with an optimal high impedance load.  DV (for whatever reason) under-spec'd capacitance of the earlier 337 models.  It was something they recognized and addressed with re-released designs.

 

Threads of interest for those into DIY...

http://www.head-fi.org/t/652270/output-coupling-cap-and-transformer-mod

 

Theres some excellent OT discussions in this thread here, and some detailed FR and THD analysis by Elliottstudio in the latter posts:

http://www.head-fi.org/t/629661/a-lo-cost-ht-supply-true-transformer-coupled-tube-headphone-amplifier

 

 

 

 

 

 

 

 

Very cool stuff, thank you.

 

KP

post #1485 of 2242
Quote:
Originally Posted by TheKillerPiglet View Post

 

 

Very cool stuff, thank you.

 

KP

Sure NP... and sorry everyone about the thread de-rail.

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